title: The radiographic density of composite restorative resins.
abstract: The radiodensities of enamel, dentin, aluminum, and 14 modern composite resins at thicknesses of 1 to 4 mm were compared. Nine of the 14 composites were radiopaque with respect to that of aluminum. Radiolucent lesions or voids were simulated by cutting grooves 0.5, 1.0, and 2.0 mm deep in aluminum stepwedge blocks, superimposing stepwedges of the radiopaque composites over the blocks, and radiographing the combination. It was found that only five of the nine radiopaque composite materials possessed radiodensities that permitted clear radiographic detection of the smaller defects.
authors.affiliation: School of Dentistry, University of Louisville, Ky.
authors.forename: P M
authors.initials: PM
authors.lastname: Curtis
authors.forename: J A
authors.initials: JA
authors.lastname: von Fraunhofer
authors.forename: A G
authors.initials: AG
authors.lastname: Farman
mesh_terms: D015502:Absorptiometry, Photon / Q000295:instrumentation; D000535:Aluminum; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003188:Composite Resins; D003287:Contrast Media; D003739:Dental Cementum / Q000000981:diagnostic imaging; D003743:Dental Enamel / Q000000981:diagnostic imaging; D003804:Dentin / Q000000981:diagnostic imaging; D006801:Humans; D011861:Radiography, Dental
chemical_list: D003188:Composite Resins; D003287:Contrast Media; D000535:Aluminum